Combined molecular and metallic particulate laser-induced contamination testing: de-risking activity for the LISA space mission

Moritz Vogel; Nils Bartels; Thomas Klumpp; Wolfgang Riede; Christian Dahl; Kai-Christian Voss; Alessandra Ciapponi; Ricardo Martins; Linda Mondin

doi:10.1117/12.2683679

24 November 2023 Combined molecular and metallic particulate laser-induced contamination testing: de-risking activity for the LISA space mission

Moritz Vogel, Nils Bartels, Thomas Klumpp, Wolfgang Riede, Christian Dahl, Kai-Christian Voss, Alessandra Ciapponi, Ricardo Martins, Linda Mondin

Author Affiliations +

Proceedings Volume 12726, Laser-Induced Damage in Optical Materials 2023; 127260N (2023) https://doi.org/10.1117/12.2683679
Event: SPIE Laser Damage, 2023, Dublin/Livermore, California, United States

Conference Poster

Abstract

To mitigate risks due to laser-induced contamination (LIC) for the LISA space mission, we have carried out an extensive LIC test campaign, including a series of short duration tests with different test parameters, as well as a long-duration test. Those previous experimental results as well as theoretical considerations indicate that LIC might be less of a concern for the LISA mission. A remaining concern is whether LIC could occur in the presence of metallic particles on optical surfaces and whether a higher pressure does have an impact. Our ongoing research thus aims at testing for a possible deposit formation in a combined LIC and metallic particulate contamination test. Therefore, a HR optics is contaminated with metallic (aluminum) particles, mounted in the sample holder and tested within a similar test setup used for previous tests. The test is performed at a pressure similar to the actual expected pressure of 10^-5 mbar at the optical bench during the mission (previous tests at 10^-8 mbar). These tests do not indicate that LIC is a concern and metallic particulate contaminants seem not to accelerate or trigger LIC in this laser regime.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Moritz Vogel, Nils Bartels, Thomas Klumpp, Wolfgang Riede, Christian Dahl, Kai-Christian Voss, Alessandra Ciapponi, Ricardo Martins, and Linda Mondin "Combined molecular and metallic particulate laser-induced contamination testing: de-risking activity for the LISA space mission", Proc. SPIE 12726, Laser-Induced Damage in Optical Materials 2023, 127260N (24 November 2023); https://doi.org/10.1117/12.2683679

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